page_title: Maatidesmus
section_title: Description
hierarchical_section_title: Maatidesmus / Description
caption_attribution_description: English: Figure 3. Maatidesmus paachtun nov. gen. and sp., holotype, 3D micro-CT reconstruction expressed in virtual colors. (A): General view, scale bar 5 mm. doi:10.1371/journal.pone.0105877.g003 Anatomical Abbreviations: ant, antennae; cl, collum; par, preanal ring
context_page_description: Maatidesmus is an extinct genus of millipede in the family Chelodesmidae known from a fossil found in North America. There is one described species in the genus, Maatidesmus paachtun, one of three millipedes described from Mexican amber.
context_section_description: The M. paachtun female is mostly a creamy white in coloration with "splattering"s of nut-brown, though the specimen shows areas of recrystallization where the cuticle and amber reacted forming possible calcium carbonates.  The total body length is 35.5 mm (1.40 in) and has a total of 19 body segments plus head.  The head is a little wider than the next body segment, called the collum.  The antennae have a total of seven antennomeres that vary in length.  The longest segments are antennomeres 2 and 6, while the shortest are antennomeres 1 and 7. The tops of the collum and body segments 2 to 5 are heavily lobed with three rows of lobes on each segment.  The large lobes change to more scattered small lobes on segments 6 and 7.  The segments gradually get wider from the head to segment 16 after which the segments start to narrow progressively to segment 19.
caption: CT reconstruction
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